Return-bend pipe connection.



J. ALLAN. v RETURN BEND PIPE CONNECTION.

APPLICATION FILED JULY 26,1909.

Patented Au 29, 1911 J mes ANQn,

WE -wean:

I U TED STATES JAMES ALLAN, OF OMAHA, NEBRASKA, ASSIGNOR- T LARSEN-BAKER ICE MACHINE CO,, A CORPORATION OF NEBRASKA.

out the pipes without changing the posiformlng Specification of Letters Patent.

Application filed July 26, 1909. Serial No. 509,741.

To all whom it may concern:

Be it known that I, J AMES ALLAN, a citizen of the United States, and a resident of Omaha, in the county of Douglas and State of Nebraska, have invented certain new and usefullmprovem'ents in Return-Bend Pipe Connections, of which the following is a specification.

My invention relates to pipe fittings and connections, especially to return bends or fittings for connecting the adjoining ends of parallel pipes, such as are employed in the coils used for cooling or heating water, brine and the like, ing and heating systems. It is the object of my invention to provide a fitting of this character of simple and inexpensive construction, which will require a minimum of machine work in its manufacture, which can easily and quickly removed for cleaning tions thereof, in which rusting or corrosion of the parts will not prevent the disconnectin thereof, and in which the joints formed Wil have a measure of elasticity so as to accommodate expansion and contraction of the pipes due to changes in the temperature thereof.

Constructions embodying my invention are illustrated in the accompanying drawings, in which- Figure 1 is a sectional View of the connection, taken through one of the pipes and in the plane of the bend, Fig. 2 is an end View of the connection, and Fig. 3 is an elevationshowing the open ends of the bend body.

In the drawings, 1 and 2 represent the pipes which are connected by the fitting. On the ends of the pipes are loosely threaded the nuts 3 which have hexagonal head portions and cylindrical neck portions or nipples {1. The bend body comprises a semiannular tubular portion 5, having outwardly shouldered end portions 6, which portions are connected by the cross-bar or web 7. In the ends of the portlons 6, adjoining the bore thereof, are annular recesses in which are placed the gaskets 8 of compressible resilient material. The diameter of the annular recesses containing the said gaskets is slightly greater than that ofthe nipples 4, so that the latter may enter the same and bear upon the gaskets, and the in refrigeratnuts are so arranged upon the pipes that the, ends of the pipes extend into the bore of the bend body past the gaskets.

Between the ipes l and 2 and adjoining the end faces of the nuts 3 is arranged the bar or yoke 9 which has forked ends 10 adapted to engage the end faces of the nuts on opposite sides of the pipes. At the center of the yoke is an opening through which is passed a bolt 11. The said bolt extends through a slot made in one side of the crossbar or Web 7 of the bend body and the head of the bolt engages the inner face of said web between the shoulders 12 thereon,which shoulders serve to engage the sides of the head and prevent the bolt from turning When the nut thereof is turned in screwing the same on or off the bolt. Then the parts are in position the ends of the nipples et engage the gaskets in the recessed ends of the bend body, so that tightening of the bolt 11 Patented Aug. 29, 1911.

compresses the gaskets and forces them into the joint but merely as a means of connect ing the nuts with the pipes. It will also be obvious that the ends of the pipes need not be accurately alined since any inequality thereof may be compensated by turning the nuts until the same are properly alined with each other. All of the parts being loosely fitted, corrosion thereof will not prevent the disconnecting of the fitting when necessary for cleaning the pipes or the like. The retention of the fitting by means of a single bolt enables rapid assembling or disconnecting of the parts, and should the bolt become corroded so that it is broken in disconnecting the fitting, it may be cheaply replaced.

Now, having described my invention, what I claim and desire to secure by Letters Patent is: j g 1. In a pipe connection of the class described, a semi-annular tubular body having a web connecting the ends thereof and recesses formed in said ends adjoining the bore thereof, bodies adapted for variable connection with pipes and having nipples arranged to enter the said recesses, a cross bar engaging said bodies on the ends thereof opposite the nipples, and means connecting said cross bar and Web.

2. In a pipe connection of the class described, the combination with parallel pipes having adjoining threaded ends, of nuts screwed on the said threaded ends of the pipes and alined transversely with each other, the said nuts having cylindrical portions at the ends thereof, a bend body having shouldered portions at the ends thereof adapted to fit over the cylindrical portions ofvthe nuts, gaskets of compressible material arranged in recesses in the bend body adjoining the ends of the said portions of the nuts, a bar having forked ends adapted to engage the end faces of the nuts oppo' site the cylindrical portions thereof, and a single bolt connecting said bar and the bend body.

3. In a pipe connection of the class described, the combination with parallel pipes, of bodies adjustably secured upon the ends of the pipes, the said bodies having cylindrical nipple portions adjoining the ends of the pipes and the pipes extending through and protruding from said nipple portions, a bend body comprising a semi-annular body having outwardly shouldered end portions with annular recesses formed therein to fit over the nipple portions of the bodies secured upon the pipes, gaskets disposed in said annular recesses adjoining the ends of the nipple portions and the protruding ends of the pipes, a cross bar engaging the bodies secured upon the ends of the pipes, and a single bolt connecting said cross bar and the bend body to draw the body toward the ends of the nipples and compress the gaskets.

In testimony whereof I have hereunto subscribed my name in the presence of two witnesses.

JAMES ALLAN. \Vitnesses R01 G. KRA'rz, D. O. BARNELL. 

